Enable tethering on iPhone 3.0 (3.1.3 maybe) - Too easy... (WORLDWIDE carriers)
iPhone 3G 16GB, Firmware 3.0/3.0.1, O2 Contract; 3.1.3 to be tested
iPhone 3GS 16GB, same stuff as the 3G
3.1.3 may work. Let us know if this is working again!
iTunes 8.2+ is needed for the drivers.
No jailbreaking needed.
This is a walkthrough of how I enabled tethering on my iPhone 3G on O2 UK. It was a lot easier than I thought - no jailbreaking needed, and all you need really is a MobileConfig file, which is essentially what O2 wants to charge you for £15 min per month!
Of course, even though the O2 iPhone contract claims to offer unlimited data download, there is still the fair use policy, so just be careful with how you use your tethering i.e. don't go watching YouTube, watching BBC iPlayer or doing any big downloads!
Also, note that the tethering option on the iPhone is only available if you're using it with an official iPhone carrier.
*Advanced tip*: if all goes wrong, you can always remove the profile by going to "Settings" -> "General" -> "Profiles" and remove whichever is bothering you. Good luck!
*Advanced tip 2*: If you're having problems with Bluetooth connection on your MacBooks, check for the Bluetooth driver software update from Apple (use OS X's software update tool).
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